Bump flat from 5.0.0 to 5.0.2 in /examples/express-typescript

Bumps [flat](https://github.com/hughsk/flat) from 5.0.0 to 5.0.2.
- [Release notes](https://github.com/hughsk/flat/releases)
- [Commits](hughsk/flat@5.0.0...5.0.2)

---
updated-dependencies:
- dependency-name: flat
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

examples/express-typescript/yarn.lock

@@ -360,11 +360,9 @@ finalhandler@~1.1.2:
     unpipe "~1.0.0"
 
 flat@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/flat/-/flat-5.0.0.tgz#dab7d71d60413becb0ac2de9bf4304495e3af6af"
-  integrity sha512-6KSMM+cHHzXC/hpldXApL2S8Uz+QZv+tq5o/L0KQYleoG+GcwrnIJhTWC7tCOiKQp8D/fIvryINU1OZCCwevjA==
-  dependencies:
-    is-buffer "~2.0.4"
+  version "5.0.2"
+  resolved "https://registry.yarnpkg.com/flat/-/flat-5.0.2.tgz#8ca6fe332069ffa9d324c327198c598259ceb241"
+  integrity sha512-b6suED+5/3rTpUBdG1gupIl8MPFCAMA0QXwmljLhvCUKcUvdE4gWky9zpuGCcXHOsz4J9wPGNWq6OKpmIzz3hQ==
 
 forwarded@~0.1.2:
   version "0.1.2"
@@ -459,11 +457,6 @@ is-binary-path@~2.1.0:
   dependencies:
     binary-extensions "^2.0.0"
 
-is-buffer@~2.0.4:
-  version "2.0.4"
-  resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-2.0.4.tgz#3e572f23c8411a5cfd9557c849e3665e0b290623"
-  integrity sha512-Kq1rokWXOPXWuaMAqZiJW4XxsmD9zGx9q4aePabbn3qCRGedtH7Cm+zV8WETitMfu1wdh+Rvd6w5egwSngUX2A==
-
 is-extglob@^2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/is-extglob/-/is-extglob-2.1.1.tgz#a88c02535791f02ed37c76a1b9ea9773c833f8c2"